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Add ScopedCustomProfile

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This commit is contained in:
János Benjamin Antal 2022-10-25 13:37:57 +02:00
parent 1e4c02f8a5
commit ee64684b0b
2 changed files with 45 additions and 4 deletions
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5
src/query/v2/plan/profile.hpp
View File

@ -26,10 +26,13 @@ namespace plan {
* Stores profiling statistics for a single logical operator.
*/
struct ProfilingStats {
static constexpr std::string_view kNumCycles{"num_cycles"};
int64_t actual_hits{0};
unsigned long long num_cycles{0};
uint64_t num_cycles{0};
uint64_t key{0};
const char *name{nullptr};
nlohmann::json custom_data;
// TODO: This should use the allocator for query execution
std::vector<ProfilingStats> children;
};

44
src/query/v2/plan/scoped_profile.hpp
View File

@ -13,6 +13,8 @@
#include <cstdint>
#include <json/json.hpp>
#include "query/v2/context.hpp"
#include "query/v2/plan/profile.hpp"
#include "utils/likely.hpp"
@ -20,6 +22,35 @@
namespace memgraph::query::v2::plan {
class ScopedCustomProfile {
public:
explicit ScopedCustomProfile(const std::string_view custom_data_name, ExecutionContext &context)
: custom_data_name_(custom_data_name), start_time_{utils::ReadTSC()}, context_{&context} {}
ScopedCustomProfile(const ScopedCustomProfile &) = delete;
ScopedCustomProfile(ScopedCustomProfile &&) = delete;
ScopedCustomProfile &operator=(const ScopedCustomProfile &) = delete;
ScopedCustomProfile &operator=(ScopedCustomProfile &&) = delete;
~ScopedCustomProfile() {
if (nullptr != context_->stats_root) {
auto &custom_data = context_->stats_root->custom_data[custom_data_name_];
if (!custom_data.is_object()) {
custom_data = nlohmann::json::object();
}
const auto elapsed = utils::ReadTSC() - start_time_;
auto &num_cycles_json = custom_data[ProfilingStats::kNumCycles];
const auto num_cycles = num_cycles_json.is_null() ? 0 : num_cycles_json.get<uint64_t>();
num_cycles_json = num_cycles + elapsed;
}
}
private:
std::string_view custom_data_name_;
uint64_t start_time_;
ExecutionContext *context_;
};
/**
* A RAII class used for profiling logical operators. Instances of this class
* update the profiling data stored within the `ExecutionContext` object and build
@ -29,7 +60,7 @@ namespace memgraph::query::v2::plan {
class ScopedProfile {
public:
ScopedProfile(uint64_t key, const char *name, query::v2::ExecutionContext *context) noexcept : context_(context) {
if (UNLIKELY(context_->is_profile_query)) {
if (UNLIKELY(IsProfiling())) {
root_ = context_->stats_root;
// Are we the root logical operator?
@ -60,8 +91,13 @@ class ScopedProfile {
}
}
ScopedProfile(const ScopedProfile &) = delete;
ScopedProfile(ScopedProfile &&) = delete;
ScopedProfile &operator=(const ScopedProfile &) = delete;
ScopedProfile &operator=(ScopedProfile &&) = delete;
~ScopedProfile() noexcept {
if (UNLIKELY(context_->is_profile_query)) {
if (UNLIKELY(IsProfiling())) {
stats_->num_cycles += utils::ReadTSC() - start_time_;
// Restore the old root ("pop")
@ -70,10 +106,12 @@ class ScopedProfile {
}
private:
[[nodiscard]] bool IsProfiling() const { return context_->is_profile_query; }
query::v2::ExecutionContext *context_;
ProfilingStats *root_{nullptr};
ProfilingStats *stats_{nullptr};
unsigned long long start_time_{0};
uint64_t start_time_{0};
};
} // namespace memgraph::query::v2::plan